﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp2
{
    class ArrayUtil
    {
        public static int[]arr;
        public static void a()
        {
            if (arr== null)
            {
                Console.WriteLine(true);
            }
            else
            {
                Console.WriteLine(false);
            }
        }

    }
}
